Al

I agree with your comment on the throttle body sharp edge influencing the test results.  I don't have a 3 " smooth intake horn available.  If I did have one I'd consider running the tests again only if I could use one of the higher capacity backpack blowers like the big one I referenced in my report with about 1.6 X  the volume and more speed in the blower pipe compared to the small hand held unit I borrowed and used.  I believe this system would have to increase MP by  a minimum of 4" HG to be useful.

Other comments to the LIST:

If I recall many of the great fighter aircraft like the P-51 and Spitfire flying in WW II used gear driven centrifugal supercharges.  I am hoping some technology can easily improve the HP produced by the 2 rotor engines so more will be installed.  I also want more Renesis engines flying because Mazda will have parts available for several years and it has been my experience that the side exhaust is easy to tame and improves fuel economy.  Unburned fuel in the combustion chamber does not get exhausted but circulates around to the next intake stroke.

Actually I don't need to change my current engine system - I am where I want to be based on performance and economy.   My water and oil temps are a little low in the cold winter, great during comfortable weather and only requires a slight reduction in throttle during extended climb out in hot summer.  If I make more power I would have to work on my cooling agai!. 

If someone finds an easy way to copy or improve on my intake that may be the answer to increasing power for most aircraft.

Dennis H.


Al Gietzen wrote:

Dennis, do you care to try your experiment again with a few

modifications? The blower effect should be independent of the prop blast

and air filter. On test (B), fit some sort of cone to the intake to

eliminate the sharp edge. I think that would compare equitably to a test

with the blower at the end of a SCAT tube.

 

What do you think, Al?

 

What you’d like for an intake where previously stationary air is being sucked in is at least a ½” radius of 90 degrees or more forming the ‘edge’ of the opening.  Beyond that I’m losing interest in this whole ideaJ.

 

Al